I have two namesets ready for printing: 04-06 MU 3rd CL set (red plastic) and 04-06 MU home CL set (art flock). I am really really really worried because I was told that old nameset could expire and fail to be ironed on. The result would be ruining the shirt and the nameset altogether. Does anyone know the tempereture and time for these two namesets? And any good store to recommend? Thank you everyone!!